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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan)
Yulnafatmawita Yulnafatmawita
Andalas University
Agriculture, Biological Sciences & Forestry Environmental Science

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INDEKS STABILITAS AGREGAT TANAH PADA PERKEBUNAN TEH BERBASIS SLOPE DAN UMUR TANAMAN DI KECAMATAN GUNUNG TALANG KABUPATEN SOLOK Dendy Detafiano Prakasa Afner; Aprisal Aprisal; Yulnafatmawita Yulnafatmawita
Jurnal Tanah dan Sumberdaya Lahan Vol. 8 No. 1 (2021)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (451.685 KB) | DOI: 10.21776/ub.jtsl.2021.008.1.10

Abstract

Land-use change from the forest into tea plantation in Solok Regency in 1983 has decreased the area of forests in Gunung Talang District. Clearing up the forest at the beginning for tea plantation could worsen the physical and chemical conditions of the soil. One of which is soil aggregate stability that is very dynamic and can influence other soil physical properties. This study was aimed to determine soil Aggregate Stability Index (ASI) at tea plantations. Soil samples was taken at a depth of 0-20 cm from five different slopes (0-8% (A), 8-15% (B), 15-25% (C), 25-45% (D), and> 45% (E)) and at two crop ages (10 and 35 years old). The results showed that the soil aggregate stability index at tea plantations ranged from stable to very stable. It tended to decrease by increasing slope percentage at each of crop age, Between the ages, it showed higher ASI at 35 years old crop age under relatively flat (0-8%) and very steep (>45%) areas.
FLUKTUASI FOSPOR DAN KEMASAMAN PADA AGREGAT TANAH DI PERKEBUNAN TEH YANG BERUMUR 36 TAHUN DI KECAMATAN GUNUNG TALANG, KABUPATEN SOLOK Bori Heria Fadli; Syafrimen Yasin; Yulnafatmawita Yulnafatmawita
Jurnal Tanah dan Sumberdaya Lahan Vol. 8 No. 1 (2021)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (547.128 KB) | DOI: 10.21776/ub.jtsl.2021.008.1.24

Abstract

Soil acidity is the dominant factor in the phosphate amount, distribution of nutrients in the aggregate is important to supporting nutrient requirement and cycling. Furthermore, Al-P and Fe-P or Ca-P bonds trapped in soil minerals, also physically protected from loss due to associate with aggregates. Thus, the factual limitation of phosphorus becomes a topic, including various aggregate fractions changes and their effect on the slope. Soil samples were taken from 36 years old plantations consisting of 45 points with two depths (0 - 20 cm and 20 - 40 cm) on a various slope, soil samples fractionated into several aggregate fractions, namely micro (<250 µm), meso (250-2000 µm) and macro-aggregates (2,000-5,000 µm). For chemical analysis, soil pH was measured by pH meter, aluminium with the volumetric method, and P-available with Bray method. Based on the analysis, it is known that the P content in the meso aggregate is higher than P content in the macro aggregate ± 0.055 g m-2 for 0 - 20 cm ± 2.136 g m-2 for 20-40 cm depth, and ± 1.058 g m-2 for slope of 0-8% at 0-20 cm depth. In total, phosphate in the tea plantation area is very low.
Co-Authors Aprisal Aprisal, Aprisal Bori Heria Fadli Dendy Detafiano Prakasa Afner Syafrimen Yasin